<template>
    <el-card class="main-card">
        <!-- 标题 -->
        <div class="title">{{ this.$route.name }}</div>
        <div class="operation-container">
            <el-button type="primary" size="small" icon="el-icon-plus" @click="openModel(null)">
                新建页面
            </el-button>
        </div>
        <!-- 相册列表 -->
        <el-row class="page-container" :gutter="12" v-loading="loading">
            <!-- 空状态 -->
            <el-empty v-if="pageList.length == 0" description="暂无页面"/>
            <el-col v-for="item of pageList" :key="item.id" :md="6">
                <div class="page-item">
                    <!-- 相册操作 -->
                    <div class="page-opreation">
                        <el-dropdown @command="handleCommand">
                            <i class="el-icon-more" style="color:#fff"/>
                            <el-dropdown-menu slot="dropdown">
                                <el-dropdown-item :command="'update' + JSON.stringify(item)">
                                    <i class="el-icon-edit"/>编辑
                                </el-dropdown-item>
                                <el-dropdown-item :command="'delete' + item.id">
                                    <i class="el-icon-delete"/>删除
                                </el-dropdown-item>
                            </el-dropdown-menu>
                        </el-dropdown>
                    </div>
                    <el-image fit="cover" class="page-cover" :src="item.pageCover"/>
                    <div class="page-name">{{ item.pageName }}</div>
                </div>
            </el-col>
        </el-row>
        <!-- 新增模态框 -->
        <el-dialog :visible.sync="addOrEdit" width="35%" top="10vh">
            <div class="dialog-title-container" slot="title" ref="pageTitle"/>
            <el-form label-width="80px" size="medium" :model="pageForum">
                <el-form-item label="页面名称">
                    <el-input style="width:220px" v-model="pageForum.pageName"/>
                </el-form-item>
                <el-form-item label="页面标签">
                    <el-input style="width:220px" v-model="pageForum.pageLabel"/>
                </el-form-item>
                <el-form-item label="页面封面">
                    <el-upload class="upload-cover" drag :show-file-list="false" action="/api/admin/config/images"
                               multiple :before-upload="beforeUpload" :on-success="uploadCover">
                        <i class="el-icon-upload" v-if="pageForum.pageCover == ''"/>
                        <div class="el-upload__text" v-if="pageForum.pageCover == ''">
                            将文件拖到此处，或<em>点击上传</em>
                        </div>
                        <img v-else :src="pageForum.pageCover" width="360px" height="180px"/>
                    </el-upload>
                </el-form-item>
            </el-form>
            <div slot="footer">
                <el-button @click="addOrEdit = false">取 消</el-button>
                <el-button type="primary" @click="addOrEditPage">确 定</el-button>
            </div>
        </el-dialog>
        <!-- 删除对话框 -->
        <el-dialog :visible.sync="isdeletePage" width="30%">
            <div class="dialog-title-container" slot="title">
                <i class="el-icon-warning" style="color:#ff9900"/>提示
            </div>
            <div style="font-size:1rem">是否删除该页面？</div>
            <div slot="footer">
                <el-button @click="isdeletePage = false">取 消</el-button>
                <el-button type="primary" @click="deletePage">确 定</el-button>
            </div>
        </el-dialog>
    </el-card>
</template>

<script>
import * as imageConversion from "image-conversion";

export default {
    created() {
        this.listPages();
    },
    data: function () {
        return {
            keywords: "",
            loading: true,
            current: 1,
            size: 8,
            count: 0,
            isdeletePage: false,
            addOrEdit: false,
            pageForum: {
                id: null,
                pageName: "",
                pageLabel: "",
                pageCover: ""
            },
            pageList: []
        };
    },
    methods: {
        openModel(item) {
            if (item) {
                this.pageForum = JSON.parse(item);
                this.$refs.pageTitle.innerHTML = "修改页面";
            } else {
                this.pageForum = {
                    id: null,
                    pageName: "",
                    pageLabel: "",
                    pageCover: ""
                };
                this.$refs.pageTitle.innerHTML = "新建页面";
            }
            this.addOrEdit = true;
        },
        listPages() {
            this.axios.get("/api/admin/pages").then(({data}) => {
                this.pageList = data.data;
                this.loading = false;
            });
        },
        addOrEditPage() {
            if (this.pageForum.pageName.trim() == "") {
                this.$message.error("页面名称不能为空");
                return false;
            }
            if (this.pageForum.pageLabel.trim() == "") {
                this.$message.error("页面标签不能为空");
                return false;
            }
            if (this.pageForum.pageCover == null) {
                this.$message.error("页面封面不能为空");
                return false;
            }
            this.axios.post("/api/admin/pages", this.pageForum).then(({data}) => {
                if (data.flag) {
                    this.$notify.success({
                        title: "成功",
                        message: data.message
                    });
                    this.listPages();
                } else {
                    this.$notify.error({
                        title: "失败",
                        message: data.message
                    });
                }
            });
            this.addOrEdit = false;
        },
        uploadCover(response) {
            this.pageForum.pageCover = response.data;
        },
        beforeUpload(file) {
            return new Promise(resolve => {
                if (file.size / 1024 < this.config.UPLOAD_SIZE) {
                    resolve(file);
                }
                // 压缩到200KB,这里的200就是要压缩的大小,可自定义
                imageConversion
                    .compressAccurately(file, this.config.UPLOAD_SIZE)
                    .then(res => {
                        resolve(res);
                    });
            });
        },
        handleCommand(command) {
            const type = command.substring(0, 6);
            const data = command.substring(6);
            if (type == "delete") {
                this.pageForum.id = data;
                this.isdeletePage = true;
            } else {
                this.openModel(data);
            }
        },
        deletePage() {
            this.axios
                .delete("/api/admin/pages/" + this.pageForum.id)
                .then(({data}) => {
                    if (data.flag) {
                        this.$notify.success({
                            title: "成功",
                            message: data.message
                        });
                        this.listPages();
                    } else {
                        this.$notify.error({
                            title: "失败",
                            message: data.message
                        });
                    }
                    this.isdeletePage = false;
                });
        }
    }
};
</script>

<style scoped>
.page-cover {
    position: relative;
    border-radius: 4px;
    width: 100%;
    height: 170px;
}

.page-name {
    text-align: center;
    margin-top: 0.5rem;
}

.page-item {
    position: relative;
    cursor: pointer;
    margin-bottom: 1rem;
}

.page-opreation {
    position: absolute;
    z-index: 1000;
    top: 0.5rem;
    right: 0.8rem;
}
</style>
